Question

A body starts from rest and moving with an acceleration $5{\text{ms}}^{–2}$. The velocity of the body when it covers a distance of $100\text{m}$ (in ${\text{ms}}^{–1}$) is

• A. $2\sqrt{10}{\text{ms}}^{–1}$
• B. $10\sqrt{2}{\text{ms}}^{–1}$
• C. $10\sqrt{10}{\text{ms}}^{–1}$
• D. $10{\text{ms}}^{–1}$

Answer 1

The correct option is C $10\sqrt{10}{\text{ms}}^{–1}$

As we know that
$v^2-u^2=2as$
Here, $u=0,v=?,a=5{\text{ms}}^{-2},s=100\text{m}$
$\therefore v^2-0=2\times 5\times 100$
$v^2=1000$
$v=10\sqrt{10}{\text{ms}}^{–1}$